Alchohol Consumption

If I am not yet pregnant (ovulating today or tomorrow) - is it ok to have a few drinks? I am completely aware of fetal alchohol syndrome and would absolutely NEVER want to cause harm to a child, but if I have not yet conceived is it going to cause any problems? It is going to be a surprise to my family, so I don't want to look suspicious when I get offered a drink and have to say no. Opinions greatly appreciated!